Chemical Reaction Engineering The concentration of A in a first order reaction, A → B, decreases Very abruptly towards the end of the reaction Logarithmically with time Exponentially with time Linearly with time Very abruptly towards the end of the reaction Logarithmically with time Exponentially with time Linearly with time ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature)) 500 600 1000 400 500 600 1000 400 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times. 32 12 8 16 32 12 8 16 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of Chanelling Bypass Ideal plug flow Dead zone Chanelling Bypass Ideal plug flow Dead zone ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R? 1.6 2.5 2 2.24 1.6 2.5 2 2.24 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Enzymes are destroyed, when the Temperature is very high Reactant's concentration is very high Reactant's concentration is very low Reaction rate is independent of the reactant's concentration Temperature is very high Reactant's concentration is very high Reactant's concentration is very low Reaction rate is independent of the reactant's concentration ANSWER DOWNLOAD EXAMIANS APP
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